Last night I came up with an odd idea. 2 siblings, brother and sister who are
not very friendly with each other but do share some of the same fetishes, well they get fused together.
Ok then lets start with a pair of canine siblings (fox, wolf, something). Species unknown right now since I only thought up the idea last night. Male and Female, not to happy with each other at the start. they drifted away and not exactly friendly with each other but since they grew up together they did end up with some odd things they liked together even if they wouldn't admit it.

So there friends invite them to a party and neither knows the other is there. it's a magic party with various fun tows and clothing to play with and someone gets out a 3 legged diaper. Just something silly and the siblings are quickly volunteered for this and blindfolded and striped down and put together in the diaper. It's all fun until they realize who the other person is in the diaper

They start arguing all the while not noticing something going on. after a minute or so arguing they try to go there separate ways but find out there flesh has fused together and it doesn't seem to be stopping as soon there sides are joined from hip to just under there arm. Worst part is they can't even get the Diaper off.

much to there dismay it isn't just sealing up there sides, there arms and legs fuse as well and are eventually absorbed and by the time it's over they are now once creature. for the most part they look the same for now but with 2 heads and a herm. they would eventually get used to it and finally come to an understanding and make up but being stuck in one body is definitely not something easy to get used to.

How they look I don't know but the best part is, the changes won't end there. there hands will change into those mitten style one you see and then they will be a bunny. not a plushie but something plushie like but still flesh and blood and fur :D one will have the normal straight ears and one will have the floppy bunny style.